Presser-foot for blindstitch sewing-machines



T. J. HAYES.

PBESSER FOOT FQR BLINDSTITCH SEWING'MACHINES. APPLICATION FILED AUG-20. 1917.

1,397,51 6, Patented Nov. 22, 1921.

Invemor.

Thomas J. Hayes by fmz v's.

UNITED STATES PATET orrlcn.

THOMAS J. HAYES, OF ROSLINDALE, MASSACHUSETTS, ASSIGNOR TO ARBETTER FELLING MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A. CORPORATION OF MAINE.

PRESSER-FOOT Application forming mechanism located above the work support.

' The principal object of the invention is to provide an improved guiding means for the superimposed layer which will permit the machine to operate properly in stitching superimposed layers of widely different thicknesses to the-main layer of material and to provide a guiding means which may readily be removed from operative position in order to permit thick seams to pass through the presserioot to the stitch forming mechanism and also to' enable the operator to see to manipulate the work as in turning the corners of garments, etc.

The present invention comprises certain improvements upon the structure shown in my prior application No. 94987 filed May 2, 1916, which discloses a presser foot having a needle throat, and a guide located adjacent said needle throat havin means for engaging the upper surface and edge of the superimposed layer and operating to direct said superimposed layer in advance of and adjacent to the stitching point which is located within the needle throat. o

More specifically the present invention is an improvement upon the structure disclosed in my prior application No. 151,427 filed Feb. 28, 1917 which. discloses a guide for the superimposed layer of the character above described which is so mounted as to be removable from guiding position in order to permit thick seams to pass through the stitching mechanism and to enable the operator to observe the work at the stitching point which is particularly desirable in turning corners, etc.

In the use of blind stitch sewing machines for making garments of (lifierent kinds and Specification of Letters Patent.

filed August 20, 1917.

FOR BLINDSTITCH SEWING-MACHINES.

Patented Nov. 22, 1921.

Serial no. 187,059.

for diflerent seasons a wide variety of ma terial is operated upon'and as blind stitch sewing machines are mainly used for telling lining to the main body of material the thickness and quality of the lining varies greatly. v v

The principal objects of the present invention are to provide guiding means which will operate properly to present the superimposed' layer, or lining, to the stitch forming mechanism when any character of m'aterial is used for the superimposed layer. This is accomplished in the present embodiment of the invention by providing a main guiding instrumentality which is adapted to engage and preferably to embrace the edge of the superimposed layer and. direct the same toward the stitching point, and a supplemental guiding instrumentality which is located nearer to the stitching point than the main guiding instrumentality and which is of a character to direct the thinner and more; flexilble material intothe path ofthe needle.

In order that theseguiding instrumentalities may be independently used, manually operable locking means are employed for re-. taining the same in guidin position and means also desirably are employed for with-. drawing and withholding one or both of said guiding instrumentalities from guidingiposition when released. a

A preferred embodiment of the invention is illustrated in the accompanying drawings as applied to a presser foot of a blindstitch sewing machine similar to that disclosed in my prior application No. 94,987 aforesaid.

In the drawings, I

Figure 1 is a plan view of a pressed foot embodying a preferred form of my invention showing the main and supplemental guiding instrumentalities in guiding position; a p v Fig. 2 is a central longitudinal sectional view showing in elevation the inner wall jof the minor toe portion andthe ends of the guiding instrumentaliteis and the means for locking said instrumentalities in guiding position;

Fig. 3 is a transverse sectional'view on lines 3-3 Flg. 1; A

Fig. 4 is a plan view of the supplemental guiding instrumentality;

Fig.5 is a plan view of the main guiding instrumentali y. I The presser foot illustrated the accompanying drawing which is particularly adapted to sewingmachines for, felling of the Arbetter type comprises a heel portion 1 having forwardly extending major and minor toe portions 2, 3, and upwardly eX- tending ears 4;, 5 having suitable apertures 6, 7 for bolts or screws to secure the presser foot to the hookbracket or other supporting 7 means upon the head of the sewing machine.

The rear central portion of the heel'is provided with the usual recess 8 to receive the shank which extends from the bobbin case and prevents' rotation of thelatter within the rotary hook or looper. Themajor toe portion is provided with a recess 9 which forms a needle throat within the area of which the needle enters the material being operated upon. The needle throat also serves to permit the base layer to be thrust upwardly into the path of the oscillating needle by suitable bender mechanism in the well known mannerr V part, preferably about one half of the major toe portion, is reduced by milling or otherwise to provide a needle guiding'surface 10 for supporting the needle as it penetrates the materialsothat its point will not be deflected into engagement with the heel .portion of the presser foot. The heel portion also preferably is provided with a guiding surface 11 which serves to support the needle after it has passed through the material.

The inner edge of the toe portion also desirably is provided with a rib 12 which engages the needle when the latter is :penetrating the superimposed layer and prevents itfrom lateral deflection as it passes through the material, thus insuring the proper amount of penetration into the thin superimposed layer.

The under surface of the minor toe por tion has a curved cloth engaging face 13 which converges toward the stitching point and extends a short distance beyond the needle throat where it forms with the wall 14 of a slot 15 in th front of the heel por tion a guiding means which directs the edge of the superimposed layer beyond the stitching point, The curved surface 13 engages and hers upon the upper surface of the superimposed layer and by reason of its curvature and its convergence toward the stitching point operates to crowd the superimposed layer toward the major toe portion and into the path of the needle.

7 In orderproperly to present the surface of the superimposed layer to the needle whether the'superimposed layer is of thick or thin material or of stiff orflexible material main and supplemental guiding instrumentalities are employed which engage the upper surface of the superimposed layer and preferably embrace the'edgc'thereof and so direct the edge of the layer as to cause its under surface to pass at an angle across the path of the needle, themainguiding instrumentality being adapted to guide heavier and stiifer fabrics. while the supplemental guiding instrumentality may be operated to direct the thinner and more flexible material closely to the stitching point. a

Means preferably are provided for independently locking these guiding instrumentalities in guiding position, said means being preferably adapted to release first one and then the other of said guiding instrumentalities.

A preferred form of guiding means which is illustrated herein comprises a main guiding instrumentality consisting of a plate 116 which is preferably of sheet metal having a curved conoidal end portion 17 toen-V gage the upper surface and to embrace the edge of the superimposed layer, said guide plate 16 having ears 18 which are pivotally mounted upon a shaft or stud 19 supported at one end in-a recess 20 in the ear 5and at its opposite end secured by a set screw 21 in a boss 22 extending upwardly from the forward end of the minor toe por tion. The supplemental guiding instrumentality comprises a. plate 23 having cars 24 which are pivoted upon a shaft or stud 25 which is anchored in the ears 18 of the 7 main guiding member 16.

The curved conoidal guiding end portion 17 of the main guiding instrumentality serves to roll the edge of the superimposed layer into substantially conodial form and direct it toward the stitching point. There the superimposed layer is of relatively heavy goods it is properly presentcdin the path of the needle so that the needle will enter the superimposed layer beneath its edge and emerge therefrom beneath or at the edge. lVhei-e the superimposed layer is composed of relatively thin and stiff material. it is likely to roll upwardly out of the path of the needle and require supplemental means for so directing it into the path of the needle that the formation of every stitch in it will be assured. The plate 23 therefore is employed to complete the guidanceof the superimposed layer in the manner aforesaid.

The plate 23 is provided witha rearward path of the needle, the superimposed guide will crush the loop down enough to present the under surface of the inturned portion of said layer unfailingly to the needle.

Any suitable means may be provided for locking the main and. supplemental guiding instrumentalities in guiding position or for releasing them from such position and for holding them when released. In the preferred embodiment oi the invention disclosed herein a helical spring 27 surrounding the stud l9 normally acts to withdraw or raise the main guiding instrumentality 16 from guiding position.

Likewise a helical spring 28 coiled upon the stud -25 operates normally to withdraw or raise the supplemental guiding instrumentality from guiding position. 7 The means for locking said guiding instrumentalities in guiding position which is illustrated herein comprises a locking member 29 slidably mounted in a groove or channel 30 extending longitudinally of the minor toe portion and held therein by overlying plates or guides 31, 32- which are secured to the presser toot respectively by the screws 21 and 33.

The locking member 29 has an UPWZLIClly projecting portion 3a which is provided with. detents 35 and 36 adapted respectively to overlie the block 2% of the supplemental guiding member and the plate 16 of the main guiding member. The detent 36 projects beyond the end of the detent 35 so that when the locking member 29 is moved longitudinally the supplemental guiding member will be released and withdrawn from guiding position by its spring 28 while the main guiding member is retained in guiding position. Further movement however, of the locking member 29 will withdraw the detent 36 from its engagement with the member 16 and permit it to be removed from guiding position by the action of its spring 27.

The locking member 29 desirably is normally maintained in locking position by a helical spring 37 located in'a recess 38 in the heel of the presser foot and which engages at its forward end a shoulder 39 upon the member 29 and at its opposite end is seated against a screw plug 40 in said recess.

It will be understood that the present embodiment of the invention is illustrative and that various modifications in construction and arrangement of parts may be made within the scope of the following claims.

Having thus described my invention what i claim as new and desire to secure by Letters Patent is:

1. A presser foot for sewing machines for telling a superimposed layer upon a base layer of material comprising toe portions adapted to engage respectively the base and superimposed layers, guiding means for the superimposed layer including a plurality of vertically movable guiding instrrmientalities pivotally mounted upon the presser toot and operating successively to engage and direct said superimposed layer as the same:

approaches the stitching point and means operable to remove one of said instrumentalities from guiding position.

2. A presser foot for sewing machines for telling a superimposed layer upon a base layer of material, comprising guiding means tor the superimposed layer including a plurality of guiding instrumentalities pivotally mounted. upon the presser foot; and operatmg successively to engage and direct said superimposed layer as the same ap-- proaches the stitching'point, means includ' ing a locking device for holding said guiding instrumentalities in guiding position and operable to successively release and remove first one and then the other of saidguiding instrumentalities"from guiding position.

3. A presser foot for sewing machines tor telling a superimposed layer upon a base layer of material, comprising guiding means for the I superimposed layer including a plurality of guiding instrumentalitiesfpivotally mounted upon said presser'foot operating successively to engage and direct said superimposed layer as the same approaches the stitching polnt and SIIIlLlllIEtIlGOHSlY operable means for locking both of said instrumentalities in guiding positionbut operable to release one of said instrumentalities while retaining the other in guiding position, and

independent means operating to withhold ing position when released. i

5. A presser foot for sewing machines for telling a superimposed layer upon a base layer or material, comprising main and supplementary guiding instrumentalities operating successively to engage and direct said superimposed layer as the same approaches the stitching point, means for locking said guiding instrumentalities in guiding position, operable to release said supplementary guiding instrumentality while retaining the main guiding instrumentality in guiding position and means'independent of said locking means for retaining the released supplemental guiding instrumentality out of guiding position when thus released.

6. A presser foot for sewing machines for said instrumentalities respectively from guidfelling a superimposed layer upon a base layer of material, comprising main and supplemental guiding instrumentalities positioned successively to engage and direct said superimposed layer as the same approaches the stitching point, means for conjointly locking said instrumentalities in guiding position operable to release said supplemental instrumentalities while retaining the main guiding instrumentality in guiding position and also operable to release said main guiding instrumentality andmeans independent of said locking means for withholding said guiding instrumentalities from sition when released.

7 A presser foot for sewing machines for felling a superimposed layer upon ,a base layer of material, comprising pivotally guiding po 'mounted guiding instrumentalities positioned successively to engage-and direct said superimposed layer asthe same approaches the stitching point, independent resilient release first one and then the other of saidv guiding instrumentalities;

9. A presser foot for sewing machines for felling a superimposed layer upon a base layer of material, a pivotally mounted main guiding instrumentality and a supplemental pivotally mounted guiding :instrumentality overlying said main guiding instrumentality and having guiding means extending beyond said main guiding instrumentality toward thestitcliing point, independent means normally tending to withdraw said guiding instrumentalities from guiding position and means for independently locking said guiding instrumentalities in guiding position whereby one of said instrumentalities may bereleased from guiding position while the other is retained in guiding position.

10, A presser foot for sewing machines for felling a superimposed layer upon a base layer ofmaterial, a pivotally mounted main guiding instrumentality and a supplemental pivotally mounted guiding instrumentality overlying said main guiding instrumentality and having guiding means extending beyond said main guiding instrumentality toward the stitching point, independent means nor mally tending to withdraw said guiding instrumentalities from guiding position, a member having detents' adapted independently to engage said supplemental and main guiding instrumentalities to lock'the same in guiding position and'operable successively to release first the supplemental guiding instrumentality and then the main guiding instrumentality.

11. A presser foot for sewing machines for felling a superimposed layer upon a base layer of'material, a 'pivotally mounted main uiding instrumentality and a supplemental pivotally mounted guiding instrumentality overlying said main guiding instrumentality and having guiding means extending beyond said main guiding instrument ality toward the stitching point, independent means normally tending to withdraw said guiding instruinentalities from guiding position, alocking member slidably mounted in said presser foot having detents positioned to engage respectively said supplemental and said main guiding instrumentalities and operable to release first one and then the other of said guiding 1 instrumentalities and resilient means for normally holding said locking member in locking position.

In testimony whereof, I have signed my name to this specification. V

THOMAS J. HAYES. 

